Title:
SWITCHED CAPACITOR AMPLIFIER CIRCUIT
Document Type and Number:
Japanese Patent JPH0215708
Kind Code:
A
Abstract:
PURPOSE: To avoid a steer step distortion, and to maintain stable feedback path characteristics by using a switched capacitor circuit which alternately samples a signal. CONSTITUTION: An input signal from an input node V1 is alternately connected through two input paths with an inversion input terminal. The first input path is constituted of switches 20 and 21, input capacitor C1, and switches 22 and 23. The second input path is constituted of switches 24 and 25, input capacitor C3, and switches 26 and 27. Therefore, in the period of alternate clock signals P1 and P2, a pair of alternate input and feedback capacitor are operated. Thus, a period when a signal can not be sampled in the input or feedback path is not generated so that any aliasing can not be generated, and any waveform distortion can be hardly generated.
Inventors:
JIYANNIBU MITSUSHIERU
Application Number:
JP7870989A
Publication Date:
January 19, 1990
Filing Date:
March 31, 1989
Export Citation:
Assignee:
NAT SEMICONDUCTOR CORP
International Classes:
H03H19/00; G11C27/02; H03F3/00; (IPC1-7): H03H19/00
Attorney, Agent or Firm:
Kazuo Kobashi (1 person outside)
Next Patent: CHANNEL SELECTING DEVICE